Incline Dumbbell Fly Key Summary Bench Angle: Set at 30° to 45° (minimizing shoulder involvement and isolating the upper chest). Starting Position: Open the chest and firmly secure the shoulder blades (scapula) against the bench. Arm Angle: Slightly bend the elbows as if hugging a large tree, maintaining the same angle throughout the exercise. Exercise Trajectory: Lower only to the point where the chest feels tight (shoulder line), and when lifting, feel as if you are bringing both biceps towards the upper chest. Breathing Method: Inhale while lowering the dumbbells, expanding the chest, and exhale with a "whoosh" when bringing them together.